Categories
EPDM O Rings
Category:
O-Rings/Seal Ring
- Product Description
-
- Commodity name: EPDM O Rings
- Commodity ID: PC-00018
EPDM rubber O-Rings has excellent ozone resistance, sunlight resistance and weather resistance, has good elasticity at low temperature, good chemical resistance (many dilute acid and alkali, polar solvents). industry.
EPDM O-Rings(Ethylene-Propylene-Diene Monomer)
The most age-resistant rubber seals (Ozone, Sunlight, Heat,UV, Water vapor )
Ethylene-Propylene-Diene Monomer
Introduction:
Product Name: EPDM O-Rings Hardness Range: 30-90 Shore A Characteristic Resistance to oxidation,
ozone and erosion,
Self-viscosity and mutual viscosity
are poor
Temperature range: -40 to +125 °颁 Elongation(Min)﹪ 110～438 Tensile strength(Min) Mpa 9.6～14.7 EPDM rubber is a synthetic rubber with ethylene and propylene as the main monomer, according to the different composition of monomers in the molecular chain, there are binary ethylene propylene rubber and EPDM, the former is a copolymer of ethylene and propylene, expressed by EPM, the latter is a copolymer of ethylene, propylene and a small amount of non-conjugated diolefin third monomer, expressed by EPDM. Both are collectively known as ethylene propylene rubber (EPR). Widely used in automotive seals,o-rings, building waterproof materials, wire and cable sheath, heat-resistant hose and other products
EPDM O-Rings Performance:
1, low density and high filling
Cost-effective, raw rubber density is only 0.86 ~ 0.90g/cm3, is the lightest density of raw rubber commonly used rubber; And can be filled in large quantities to reduce the cost of rubber material.
2. Aging resistance
EPDM o-rings has excellent aging resistance, weather resistance, ozone resistance, sunlight resistance, heat resistance, ,ultraviolet resistance, radiation resistance and other aging properties. EPDM o-rings can be used for a long time at 120 ° C, and can be used briefly or intermittently at 150-200 ° C. Adding suitable antioxidant can increase the use temperature. Epdm rubber crosslinked by peroxide can be used under harsh conditions. Epdm rubber can reach more than 150h without cracking under the condition of ozone concentration of 50pphm and stretching 30%
3, Water steam resistance
EPDM rubber has excellent resistance to water vapor. In the superheated steam at 230℃, the appearance does not change after nearly 100h. Fluorine rubber, silicone rubber, fluorine silicone rubber, butyl rubber, nitrile rubber, natural rubber under the same conditions, experienced a relatively short period of appearance deterioration phenomenon.
4. Resistance to excessive hot water
EPDM rubber also has good resistance to superhot water, but it is closely related to all vulcanization systems. After soaking in superheated water at 125℃ for 15 months, the mechanical properties of ethylene propylene rubber with dimorphine disulfide and TMTD as vulcanization system changed little, and the volume expansion rate was only 0.3%
5. Electrical performance
EPDM rubber has excellent electrical insulation properties and corona resistance, and its electrical properties are better than or close to that of styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene and crosslinked polyethylene.
6. Adhesiveness
Due to the lack of active groups in the molecular structure, the cohesion energy of EPDM rubber is low, and the adhesive material is easy to spray frost, and the self-viscosity and mutual viscosity are poor.
7. Corrosion resistance
Due to the lack of polarity and low unsaturation, EPDM rubber has good resistance to various polar chemicals such as alcohols, acids, bases, oxidants, refrigerants, detergents, animal and plant oils, ketones and fats. However, it has poor stability in lipid and aromatic solvents (such as gasoline, benzene, etc.) and mineral oils. The performance will also decline under the long-term action of concentrated acid
Application
Commonly used in high temperature water vapor environment seals; Sanitary equipment seals or parts and refrigerators and refrigeration equipment seals, etc
Keywords:- EPDM O-Rings
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